CN104905866A - 一种空心钉 - Google Patents

一种空心钉 Download PDF

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Publication number
CN104905866A
CN104905866A CN201510370213.8A CN201510370213A CN104905866A CN 104905866 A CN104905866 A CN 104905866A CN 201510370213 A CN201510370213 A CN 201510370213A CN 104905866 A CN104905866 A CN 104905866A
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hollow
rivet nut
nail
nail body
elastic sheet
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张宝龙
孙守贵
张宝顺
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Beijing Bei Sida Bioisystech Co Ltd
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Beijing Bei Sida Bioisystech Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/864—Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8605—Heads, i.e. proximal ends projecting from bone
    • A61B17/861—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
    • A61B17/862—Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the periphery of the screw head
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/74—Devices for the head or neck or trochanter of the femur
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone

Abstract

本发明提供了一种空心钉，属于骨科用医疗器械领域，包括空心结构的钉体，钉体的头部对称开有两个U型槽，U型槽的开口处位于钉体的头部，钉体内部设有一空心杆，空心杆的顶端设有一定位块，定位块螺纹连接于钉体的尾部，空心杆的底端连接一向上凸起的弧形弹片，弧形弹片的两端固定于钉体的头部的内壁上。本发明结构简单，设计合理，在钉体旋入后骨折处，钉体内部设有弧形弹片，弧形弹片在空心杆的作用下发生变形，被下压的弧形弹片可以使钉体的头部向外扩张变形，能够减少钉体松动，甚至脱出的发生率，有效提高在松质骨骨折固定的稳定性和可靠性。

Description

一种空心钉
技术领域
本发明涉及骨科用医疗器械领域，具体是一种空心钉。
背景技术
随着我国人口老龄化，老年股骨颈骨折发病率不断提高，由于老年人骨质疏松以及股骨颈局部缺血，容易发生骨不连及股骨头坏死，故该骨折已成为老年医学重要课题，随着手术条件的改善和手术技巧的积累，C型臂透视下急诊行双头加压空心钉内固定术以其手术时间短、创伤小、住院时间端、费用低等优点成为基层医院及患者的首选。现有的空心钉为一端有螺纹，或者两端都有螺纹，但由于目前临床常用的空心螺钉存在提拉固定强度不够，常导致术后骨折移位，螺钉松动脱出，最终固定失败。尤其对于临床常见的老年股骨颈骨折，由于多数患者存在骨质疏松，普通的空心钉难以达到抗旋转，抗滑动的目的，因此常出现内固定空心钉松动脱出的现象。
发明内容
本发明要解决的问题是：克服现有技术的不足，提供一种结构简单，设计合理，旋入后骨折面愈合紧密，能够减少钉体松动甚至脱出的发生率，有效提高在松质骨骨折固定的稳定性和可靠性的空心钉。
为解决上述技术问题，本发明采用的技术方案是：一种空心钉，包括空心结构的钉体，所述钉体的头部对称开有两个U型槽，所述U型槽的开口处位于钉体的头部，所述钉体内部设有一空心杆，所述空心杆的顶端设有一定位块，所述定位块螺纹连接于钉体的尾部，所述空心杆的底端连接一向上凸起的弧形弹片，所述弧形弹片的两端固定于钉体的头部的内壁上。
进一步地，所述定位块为圆柱形结构。
进一步地，所述定位块上设有外螺纹，所述钉体的尾部设有内螺纹，所述外螺纹与内螺纹相适配。
进一步地，所述定位块的底部中心开有一定位孔，所述空心杆的顶端位于定位孔内。
进一步地，所述定位块的顶部设有一一字型或十字型的开槽。
进一步地，所述弧形弹片的两端焊接于钉体的头部的内壁上。
进一步地，所述钉体的材质为Ti-6Al-4V、Ti-6Al-7Nb或00Cr18Ni14Mo3。
进一步地，所述钉体的头部设有螺纹。
本发明具有的优点和积极效果是：
本发明结构简单，设计合理，在钉体旋入后骨折处，钉体内部设有弧形弹片，弧形弹片在空心杆的作用下发生变形，被下压的弧形弹片可以使钉体的头部向外扩张变形，能够减少钉体松动，甚至脱出的发生率，有效提高在松质骨骨折固定的稳定性和可靠性。
附图说明
图1是本发明空心钉的结构示意图。
图2是本发明空心钉的尾部的剖视图。
图3是本发明空心钉的定位块的结构示意图。
图4是本发明空心钉的定位块的剖视图。
图5是本发明空心钉的定位块的俯视图。
图6是本发明空心钉的定位块的仰视图。
图中：1、钉体；2、U型槽；3、空心杆；4、定位块；5、定位孔；6、弧形弹片；7、开槽；8、螺纹。
具体实施方式
如图1-6所示，一种空心钉，包括空心结构的钉体1，钉体1的材质为Ti-6Al-4V，钉体1的头部对称开有两个U型槽2，U型槽2的开口处位于钉体1的头部，钉体1内部设有一空心杆3，空心杆3的顶端设有一圆柱形结构的定位块4，定位块4的底部中心开有一定位孔5，空心杆3的顶端位于定位孔5内，定位块4螺纹连接于钉体1的尾部，定位块4上设有外螺纹，钉体1尾部设有内螺纹，外螺纹与内螺纹相适配，空心杆3的底端连接一向上凸起的弧形弹片6，弧形弹片6的两端焊接于钉体1的头部的内壁上，定位块4的顶部设有一十字型的开槽7钉体1的头部设有螺纹8。
本实施例的工作过程：将空心钉的钉体1旋入骨折处，钉体1的头部和尾部分别位于骨折面的两侧，钉体1内部设有弧形弹片4，弧形弹片4在空心杆3的作用下发生变形，被下压的弧形弹片4可以使钉体1的头部向外扩张变形，能够减少钉体松动，甚至脱出的发生率，有效提高在松质骨骨折固定的稳定性和可靠性。
以上对本发明的实施例进行了详细说明，但所述内容仅为本发明的较佳实例，不能被认为用于限定本发明的实施范围。凡依本发明申请范围所作的均等变化与改进等，均应仍归属于本发明的专利涵盖范围之内。

Claims (8)

1.一种空心钉，包括空心结构的钉体，其特征在于：所述钉体的头部对称开有两个U型槽，所述U型槽的开口处位于钉体的头部，所述钉体内部设有一空心杆，所述空心杆的顶端设有一定位块，所述定位块螺纹连接于钉体的尾部，所述空心杆的底端连接一向上凸起的弧形弹片，所述弧形弹片的两端固定于钉体的头部的内壁上。
2.根据权利要求1所述的一种空心钉，其特征在于：所述定位块为圆柱形结构。
3.根据权利要求1或2所述的一种空心钉，其特征在于：所述定位块上设有外螺纹，所述钉体的尾部设有内螺纹，所述外螺纹与内螺纹相适配。
4.根据权利要求3所述的一种空心钉，其特征在于：所述定位块的底部中心开有一定位孔，所述空心杆的顶端位于定位孔内。
5.根据权利要求4所述的一种空心钉，其特征在于：所述定位块的顶部设有一一字型或十字型的开槽。
6.根据权利要求1所述的一种空心钉，其特征在于：所述弧形弹片的两端焊接于钉体的头部的内壁上。
7.根据权利要求1所述的一种空心钉，其特征在于：所述钉体的材质为Ti-6Al-4V、Ti-6Al-7Nb或00Cr18Ni14Mo3。
8.根据权利要求1所述的一种空心钉，其特征在于：所述钉体的头部设有螺纹。
CN201510370213.8A 2015-06-29 2015-06-29 一种空心钉 Pending CN104905866A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109984832A (zh) * 2018-12-28 2019-07-09 丽水市人民医院 一种空心钉及与其配套的取钉器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203468725U (zh) * 2013-09-09 2014-03-12 中国人民解放军第四军医大学 一种股骨近端髓内钉扩张性髋螺钉
CN204049820U (zh) * 2014-08-12 2014-12-31 深圳市沃尔德外科医疗器械技术有限公司 脊柱椎弓根螺钉

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203468725U (zh) * 2013-09-09 2014-03-12 中国人民解放军第四军医大学 一种股骨近端髓内钉扩张性髋螺钉
CN204049820U (zh) * 2014-08-12 2014-12-31 深圳市沃尔德外科医疗器械技术有限公司 脊柱椎弓根螺钉

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109984832A (zh) * 2018-12-28 2019-07-09 丽水市人民医院 一种空心钉及与其配套的取钉器
CN109984832B (zh) * 2018-12-28 2022-04-15 丽水市人民医院 一种空心钉及与其配套的取钉器

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